Lawyer Walter Alvarez filed the litigation Wednesday on behalf of clients Nancy Gresham and her daughter, Judy Abernathy, the Times Media Company reports.

Alvarez alleges that Gresham and Abernathy were traveling on Indiana interstate I-65 when the combination of smoke from a burning hay field and early-morning fog reduced visibility to 30 feet, causing drivers to crash into each other.

According to Alvarez, the smoke originated from a fire at the Bos Dairy LLC of Fair Oaks in Jasper County, Ind. He is also investigating if other drivers contributed to the cause of the accidents, which left his clients with broken bones and other injuries. Read more from the Times Media Company.